Five popular recreational sports are recognized on a strip of five stamps honoring dedicated athletes who gather by the millions at diamonds, courts, lanes and links across America. Three of the sports featured in the set are marking centennial anniversaries this year: the United States Golf Association (USGA) is celebrating the 100th anniversary of its first championship. The American Bowling Congress is celebrating the 100th anniversary of its founding and USA Volleyball is celebrating the 100th anniversary of the invention of the sport of volleyball.